Fix a crash of SRI when used with web workers

third_party/WebKit/Source/core/frame/SubresourceIntegrity.h

Index: third_party/WebKit/Source/core/frame/SubresourceIntegrity.h
diff --git a/third_party/WebKit/Source/core/frame/SubresourceIntegrity.h b/third_party/WebKit/Source/core/frame/SubresourceIntegrity.h
index 1f9bddbe7db9412be0e2e3c6ccba93a127df84c4..b42f7b89adff350a1d6dbc7d7f5dbf0276b2cd16 100644
--- a/third_party/WebKit/Source/core/frame/SubresourceIntegrity.h
+++ b/third_party/WebKit/Source/core/frame/SubresourceIntegrity.h
@@ -14,8 +14,8 @@
 
 namespace blink {
 
-class Document;
 class Element;
+class ExecutionContext;
 class KURL;
 class Resource;
 
@@ -46,13 +46,13 @@ class CORE_EXPORT SubresourceIntegrity {
                                         const char*,
                                         size_t,
                                         const KURL& resourceUrl,
-                                        Document&,
+                                        ExecutionContext&,
                                         WTF::String&);
   static bool CheckSubresourceIntegrity(const IntegrityMetadataSet&,
                                         const char*,
                                         size_t,
                                         const KURL& resourceUrl,
-                                        Document&,
+                                        ExecutionContext&,
                                         WTF::String&);
 
   // The IntegrityMetadataSet arguments are out parameters which contain the
@@ -63,7 +63,7 @@ class CORE_EXPORT SubresourceIntegrity {
   static IntegrityParseResult parseIntegrityAttribute(
       const WTF::String& attribute,
       IntegrityMetadataSet&,
-      Document*);
+      ExecutionContext*);
 
  private:
   friend class SubresourceIntegrityTest;